Oncomiracidium

An oncomiracidium is the ciliated and free-living larva of a monogenean, a type of parasitic flatworm commonly found on fish. It is similar to the miracidium of Trematoda, but has sclerotised (hardened) hooklets not found in the latter.^{[1][2][3][4][5][6][7][8][9][10][11][12]}

The oncomiracidium of Microcotyle donavini (Microcotylidae)